shoulder shrunk half size in 2 weeks being injured?

[bigballsmgee]

I badly strained my rotator cuff one physio told me i tore a labrum then another told me rotator strain since its getting much stronger i suspect the 2nd was right. Injury was 2 months ago while wrestling 2 weeks after i noticed my injured shoulder was half the size when flexing in the mirror the front delts mainly. Left has stayed same size , is it common for injured parts to muscle waste alot faster than normal?

[Cuz]

my right shoulder is injured now for 5 months, not really much I can tell. But I kept training through it. It should come back up when you start training again I would think.